Chevrolet 1977 light duty truck Service Manual page 141

Fig. 2D 32 Removing Door Glass
4. Install regulator
Lubricate regulator gear with lubriplate or equivalent.
W IN D O W REG ULATO R - POW ER - CK
MODELS
In the case that window will not operate, check
electrical connections first.
location o f junctions, switch, relay and circuit breaker.
Replacem ent
Electrical
C A U T IO N :
rem oved fr o m window
perform ing any operation on the regulator.
Figure 2D-34 illustrates location o f regulator
on door a n d wiring.
Fig. 2D-33--Power W indow Switch, Relay and Breaker
Assembly
N O T C H
ROLLER
by reversing above steps.
Figure 2D-33 illustrates
connectors m ust be
lift m otor before
Fig. 2D-34--Power W indw Regulator, M otor and
Connector
1. Disconnect battery ground cable.
2. Remove door upper trim panel.
3. Remove arm rest bracket and pull assist handle
bracket.
4. Remove remote control bolts and lay control
assembly aside for access.
5. Remove glass outer seal.
6. Remove rear glass run channel.
7. Remove regulator to door panel attaching nuts
and screws, and pull rear of glass up as far as possible
and rotate clockwise approximately 90° to remove glass
from door.
8. Disconnect harness from regulator.
9. Rotate motor regulator approxim ately 90° to
access hole in door.
W A R N IN G : Step 10 must be performed when
reg u lato r is rem oved
regulator lift arms are under tension from
the counterbalance spring and can cause
serious injury if the
without locking the sector gear in position.
10. Drill a hole through the regulator sector gear
and back plate. DO N O T drill hole closer than 1/2" to
edge o f sector gear or back plate. Install a pan head
sheet metal tapping screw (No. 10 - 12 x 3/4 ) in drilled
hole to sector g ear in position.
lock
11. Remove m otor to regulator attaching screws.
12. Remove m otor from regulator.
13. Prior to installation, lubricate the motor drive
gear and regulator sector teeth.
from door. The
m otor is removed